Toolholder



April 1o, 1945. l.. BROWN 2,373,535

TOOL HOLDER Filed Sept. 12, 1944 2 Sheets-Sheet l A Jflgl. ^-J1f9.3.

' l .Am-i110, 194s. L, B, BROWN l Y 2,373,535

TooL HOLDER Fil-ed Sept.v 12, 1944 2 Sheets-Sheet 2 Z Brown IN VEN TOR.

Patented Apr. 1o, 1945 UNITED STATE TOIOLHOLDER Louis B. Brown,Duquesne, Pa'. Application September 12, 1944, Serial No. 553,740

. This invention relates to a tool-holder for use on lathes, one of theobjects being to provide a device of this character designed to tightlygrip and hold a plurality of cutting tools, there being means providedwhereby each of the toolsv can be adjusted to any desired angleindependently of the other tools in the holder, after which a singleclamping means can be utilized whereby all of the held tools will begripped simultaneously to hold them against accidental displacement`.while in use.

A further object is to provide simple and efcient means for locking theholder in any position to which it might be adjusted on a lathe.

A still vfurther object is to provide a structure of this characterwhich is simple and compact inconstruction, can be adjustedreadily, andcan be easily handled.

With the foregoing and other objects in View, which will appear as thedescription proceeds, the invention consists of certain novel steps inthe method and certain details of construction and combinations of partshereinafter more fully described and pointed out in the claims, it beingunderstood that changes may be made in the method disclosed and in theconstruction and arrangment of parts without departing from the spiritof the invention as claimed.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings,

Figure 1 is atop plan view.

Figure 2 is a side elevation.

Figure 3 is a section on line 3 3, Figure 2.

Figure 4 is an enlarged section on line 4 4, of Figure 1. y f

Figure 5 isan enlarged section on line 5 5, of Figure 1. I

Referring to the gures by characters of reference, I designates asupporting element, hav'- ing a channel 2 formed with undercut orrecessed walls providing side grooves 3.

Channel 2 is designed to receive an adjustable post 4, the head 5 ofwhich is proportioned to extend into the recesses or 'grooves 3. Thatportion of the post adjacent to the support I is screwthreaded asindicated at 6 Vfor engagement by a plate 1 constitutingv a nut which,when turned in one direction relative to the post, will frictionallychannel 2.

Removably mounted on the post 4 is a bottom plate 8 which is of anypreferred shape, although in the'present instance it isv square, asshown particularly in Figure 3. Each lside of the plate has a rabbetY 9in the upper portion thereof and movably mounted within each rahbetis ajaw l0 in the form of lan elongated bar provided, adjacent to each ofits ends, with a dowel Il, anchored vas at` I2 in the jaw and extendingdownwardly through an opening I3 in the bottom plate 8. This opening iscounterbored as' at I4 and moveably mounted in the counterbore is thehead I 5 Aof the `dowel Il. The two dowelscarried by each jaw adjacentits ends are both loosely mounted within the openings I3 and theAcounterbores I4 provided therefor, so thatthe jaw thus is free to tiltrelative to `the plate 8 although held assembled therewith andsubstantially restrained from longitudinal movement relative thereto.

, Screw threaded openings `I 6 are' provided inl the plate B between,but adjacent to, the "dowels heretofore described and in each of theseopenings is seated an adjusting screw I1 which can be provided with asocket whereby a suitable wrench can be used for rotating the screw forthe purpose of shifting the jaw Ill engaged thereby. Ob-

. viously, by separately adjusting these screws the jaw can bepositioned at any desired angle relative to the plate 8. If necessarythe holder can be removed from the post 4 to afford access to theadjusting screws I1.

The parts thus far described are duplicated in connection with each ofthe jaws I0 at the four.

sides of plate 8. I

A top plate I8 -which is, similar in construction to the plate 8, ismounted on the post 4 and is disposed oppositely thereto so that therabbets I9 in the sides thereof open downwardly toward plate 8. Eachofthese rabbets contains a jaw 20 similar to the jaw I0 and each of thesejaws has a pair of dowels 2| anchored therein adjacent to its ends, asindicated at 22. The dowels are slidably mounted in openings 23 in thetop plate I8 and these openings are counterbored as at 24 to receive theheads '25 on the dowels 2|. Thus these dowels serve to support the jaws20 againstv separation from the top plate' I8.

Screw threaded openings 2B are provided in the top plate vbetween andadjacent to the dowels associated with each one of the jaws and in eachof these `openings is an adjusting screw 21 which, like the screws I'I,is provide-d with an angular socket for the reception of a suitablewrench by which the screw can be turned to press against jaw 20 andmaintain it at any predetermined angle while in gripping position.

The two plates 8 and I8 are joined by tie-bolts 28 and that portion ofthe post 4 extending outwardly beyond the top plate I8 is screw threadedas at 29. A cap 30 is keyed on this extended portion of the post asindicated at 3l so as to rotate with the post While being free to sliderelative thereto. A nut 32 engages the threaded portion of the post andby turning the same in one direction the cap 30 can be pressed tightlyagainst the top plate I8 so that the holder can thus be clamped tightlyvon to they plate l. An annular series of recesses is formed in theperiphery of the cap 30 and any one of these recesses is designed toreceive a spring pressed locking pin 34 slidably mounted in a bracket 35on plate I8 and having a knob or handle 36 whereby it can readily bewithdrawn from the recess 33 against the action of the spring 31 mountedon Vthe pin and holding it normally projected toward or into-the cap 30.

yIn practice the post 4 is adjusted to the position in which it is to beheld on the supporting structure I, after which the nut formed by platel is screwed tightly against the support to hold the post in theposition to which it has been moved.

The cutting tools T to be mounted in the holder are placed between theopposed jaws I and 28 and by means of the screws Il and 21, these onpost 4 so as to bring any one of the tools into Working position,whereupon pin 34 is released and will snap into the adjacent recess 33,thereby securing the screw against displacement during the cuttingoperation.

Obviously, tools of different thicknesses and of different types can heheld simultaneously within the device and any one o`f them quicklybrought into working position, as will be readily seen.

What is claimed is:

l. A tool holder including a post, opposed plates mounted for rotationon the post, each plate having rabbeted edges providing seats, elongatedjaws positioned for movement in the respective seats, dowels extendedfrom each jaw and slidably and tiltably mounted in one of the plates,ad-

justing screws in each plate between the dowels engaging one of thejaws, the jaws on the plates being oppositely disposed and positioned toreceive cutting tools therebetween, and means separate from the postfordrawing the plates toward each other to simultaneously bind all ofthe jaws upon the interposed tools.

2. A tool holder including a post, opposed plates mounted for rotationon the post, each plate having rabbeted edges providing seats, elongatedjaws are forced against the tools and are brought C to the correctpositions for holding the tools atV proper angle relative to the plates8 and I 8. With the parts thus adjusted and assembled, the tie bolts 28are tightened and all of the tools thus securely gripped so that theycannot shift relai535 with the cap 30, the entire holder can be rotatedf4.0

jaws positioned for movement in the respective seats, dowels extendedfrom each jaw and slidably and tiltably mounted in one of the plates,adjusting screws in each plate between the dowels engaging one of thejaws, the jaws on the p'lates being oppositely disposed and positionedto receive cutting tools therebetween, and means separate from the postfor drawing the plates toward each other to simultaneously bind all ofthe jaws upon the interposed tools, and selective means on the post andone of the plates for locking the plates against rotation when aselected tool is in working position.

LOUIS B. BROWN.

